2005 Wrangler x
My jeep "bucks" when I'm travelling at low speed and apply throttle....like when you're going through a parking lot. Sometimes it gets so bad I have to push the clutch in till it settles down. I've replaced the plugs and removed and cleaned the throttle body but that didn't help (but it did fix the erratic idle speed it had) Is this common behavior?

This might not be your problem but mine did the same thing when the rear driveshaft to diff u-joint went out. Are you getting any vibrations through the other gears? I think the driveshaft was binding up causing my jeep to buck.

This is no shudder and it will do it after warmed up. I just had my wife ease the clutch in and out while I watched for play in the ujoints, motor and trans mounts and rear axle. Everything looks good, surprizingly good for 118,000+ miles.